St. Mary R nr Int'l Boundary, MT

CARDSTON COUNTY, AB49.0119°N, -113.2992°W Updated 23 hr ago

FLOW RATE

1,653cfs

Flow Rate Historical Avg

MEDIAN FLOW RATE · 30 DAY

1,653cfs 1.3% vs avg

Optimal band: 1,301–1,761 cfs

PERIOD HIGH

4,879cfs

PERIOD LOW

1,029cfs

RUNNABLE

35%

last 30 day in band

Precipitation History

Your History · St. Mary R nr Int'l Boundary, MT

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49.0119, -113.2992

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DATA · USGS · NOAA · NWSUPDATED 2026-07-07 00:00 UTC

Site #05020500·USGS

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